Mon, 26 Sep 2016 19:36:47 -0400

Colombia President Juan Manuel Santos and the top commander of the Revolutionary Armed Forces of Colombia Rodrigo Londono shake hands. (Fernando Vergara/AP)The accord between the country's government and its largest rebel movement ends a half-century of combat.

Mon, 26 Sep 2016 19:30:28 -0400

(Kelli Grant/Yahoo News)Stay tuned afterward as Katie Couric and Matt Bai host a panel of experts breaking down tonight’s biggest moments.

Mon, 26 Sep 2016 11:03:25 -0400

Gunman injures several in Houston; suspect shot by policeA heavily armed, disgruntled lawyer randomly shot at drivers before police shot and killed him, authorities said.

Mon, 26 Sep 2016 15:44:51 -0400

A composite image of possible water plumes on the south pole of Jupiter's moon Europa. (NASA/AP)Europa's plumes may make it easier to learn whether life exists in the warm, salty ocean beneath its icy surface.

Mon, 26 Sep 2016 16:35:46 -0400

New Jersey Gov. Chris Christie enters the Borough Hall in Fort Lee to apologize to Mayor Mark Sokolich. (Spencer Platt/Getty Images)A former Port Authority official testified that the "time for some traffic problems" email began the events in Fort Lee, N.J.

Mon, 26 Sep 2016 15:38:12 -0400

President Obama (Olivier Douliery-Pool/Getty Images)A showdown is set over the president's veto of a bill that would let families of Sept. 11 victims to sue Saudi Arabia.